复合材料风电叶片预埋螺栓套连接的轴向刚度分析

doi:10.19936/j.cnki.2096-8000.20231128.012

复合材料科学与工程 ›› 2023, Vol. 0 ›› Issue (11): 90-95.DOI: 10.19936/j.cnki.2096-8000.20231128.012

复合材料风电叶片预埋螺栓套连接的轴向刚度分析

高翔¹, 喻光安², 刘志强¹, 席振钊¹, 刘防防¹, 宋笑非^3*, 秦志文²

1.华电新疆发电有限公司新能源分公司,乌鲁木齐 830000;
2.武汉理工大学材料科学与工程学院,武汉 430070;
3.内蒙古工业大学能源与动力工程学院,呼和浩特 010051

收稿日期:2022-09-02 出版日期:2023-11-28 发布日期:2023-12-14
通讯作者: 宋笑非(1997—),男,硕士研究生,主要从事复合材料连接与风电叶片夹芯结构方面的研究,sxiaofei1126@163.com。
作者简介:高翔(1985—),男,学士,高级工程师,主要从事风机自动化方面的研究以及新能源电气工程方面的工作。
基金资助:
中国华电集团公司科技项目(CHDKJ22-02-79)

Stiffness analysis of embedded bushing with stud bolt connection in wind turbine blades

GAO Xiang¹, YU Guang’an², LIU Zhiqiang¹, XI Zhenzhao¹, LIU Fangfang¹, SONG Xiaofei^3*, QIN Zhiwen²

1. New Energy Branch, Huadian Xinjiang Power Generation Co., Ltd., Urumqi 830000, China;
2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;
3. School of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China

Received:2022-09-02 Online:2023-11-28 Published:2023-12-14

摘要/Abstract

摘要： 预埋方式的螺栓连接是大型风力机叶片根部连接和分段式叶片连接的主要形式之一。螺栓连接刚度的准确计算是保证风电叶片静态和疲劳载荷安全设计的重要因素。基于分段式叶片中的预埋螺栓套连接结构,假设被连接件内的轴向应力满足锥形分布,推导了其轴向刚度的解析方程;采用有限元数值方法确定了锥形半角;研究了螺栓直径、夹持长度以及螺栓套厚度对被连接件刚度的影响,通过对比被连接件刚度的解析解与数值解,验证了预埋螺栓套刚度解析表达式的精度。结果表明:预埋螺栓套连接的锥形半角取值范围为15°~18°;被连接件的刚度随着螺栓直径、螺栓套厚度的增大而增大,随着夹持长度的增大而逐渐减小。

关键词: 预埋螺栓套连接, 轴向刚度分析, 风力机叶片, 有限元, 螺栓连接, 复合材料

Abstract: Embedded bushing with stud bolt connection is a major method for root connection and segment joint of large wind turbine blades. Accurate computation of clamped member stiffness is a key issue to ensure the safety design of static and fatigue loads of wind turbine blades. Based on the embedded bushing with stud bolt connection used in a real sectional blade, assuming frustum distribution of the stress field of the hollow cone clamped embedded bushing members, the analytical expression of axial member stiffness could be derived. The finite element method was implemented to determine the suitable conical half-angle. The effects of the bolt diameter, the thickness of the bushing, and the grip length on the axial member stiffness were further studied. By comparing the analytic and numerical solutions, the accuracy of the theoretical expression of axial member stiffness was verified. Member stiffness increases with the diameter of the bolt and the thickness of the embedded bushing but reduces gradually with grip length. The results indicated that the preferable conical half-angle for embedded bushing with stud bolt connection is between 15° and 18°.

Key words: embedded bushing with stud bolt connection, axial stiffness analysis, wind turbine blade, FEM, bolted joint, composites

中图分类号:

TB332

高翔, 喻光安, 刘志强, 席振钊, 刘防防, 宋笑非, 秦志文. 复合材料风电叶片预埋螺栓套连接的轴向刚度分析[J]. 复合材料科学与工程, 2023, 0(11): 90-95.

GAO Xiang, YU Guang’an, LIU Zhiqiang, XI Zhenzhao, LIU Fangfang, SONG Xiaofei, QIN Zhiwen. Stiffness analysis of embedded bushing with stud bolt connection in wind turbine blades[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(11): 90-95.

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复合材料风电叶片预埋螺栓套连接的轴向刚度分析

Stiffness analysis of embedded bushing with stud bolt connection in wind turbine blades

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